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[julien <jrmlhermitte@xxxxxxxxx>]

Here is some more insight, output from my /var/log/Xorg.0.log. When I
close and re-open my laptop lid, I get the following (I tried it twice
in this case):

[ 1594.192] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 1806.732] (II) AIGLX: Resuming AIGLX clients after VT switch
[ 1806.736] (II) intel(0): switch to mode 1920x1080@60.0 on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 1806.797] (--) synaptics: DLL0665:01 06CB:76AD UNKNOWN: touchpad found
[ 1809.696] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 1812.650] (II) AIGLX: Resuming AIGLX clients after VT switch
[ 1812.650] (II) intel(0): switch to mode 1920x1080@60.0 on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 1812.717] (--) synaptics: DLL0665:01 06CB:76AD UNKNOWN: touchpad found
[ 1821.640] (II) AIGLX: Suspending AIGLX clients for VT switch

Note the line "[ 1806.736] (II) intel(0): switch to mode 1920x1080@60.0
on eDP1 using pipe 0, position (0, 0), rotation normal, reflection
none", it seems to be playing around with the resolution.

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https://bugs.launchpad.net/bugs/1486036

Title:
  Faulty graphics behaviour when resuming from suspend with intel
  graphics drivers

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I will copy and paste an excerpt from the link below. Is this the
  right place to post the bug?

  Waking from suspend, everything seems normal, except the graphical
  elements and text on my desktop are not drawn properly. Sometimes,
  moving the mouse over icons can cause them to be redrawn, sometimes
  not. It appears not to matter how I initiate the suspend (e.g. by
  closing laptop lid, or by calling pm-suspend explicitly) and it
  appears not to matter whether I am using an external display or the
  laptop's own screen.

  All other hardware appears to be working, and I can restart the laptop
  by clicking where the icons ought to be. The only symptom seems to be
  that the drawing does not happen correctly.

  I'm not sure what additional information I should provide to help
  diagnose the problem, so please advise me.

  Also, if this is more likely to be a xfce issue, then please change
  the package on the bug report.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: pm-utils 1.4.1-15
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed May 6 17:17:51 2015
  InstallationDate: Installed on 2015-05-04 (1 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  PackageArchitecture: all
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

  Written by David Abergel

  Please see the link here:
  https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1452318
  --- 
  ApportVersion: 2.17.2-0ubuntu1.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  julienl    1792 F.... pulseaudio
   /dev/snd/controlC0:  julienl    1792 F.... pulseaudio
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=2233869d-5832-469c-a447-f4da17530958
  InstallationDate: Installed on 2015-06-21 (91 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  MachineType: Dell Inc. XPS 13 9343
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=d161d0e8-74e3-4914-abff-8cfa0af8df95 ro quiet splash video=SVIDEO-1:d vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-25-generic N/A
   linux-backports-modules-3.19.0-25-generic  N/A
   linux-firmware                             1.143.3
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-25-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo users vboxusers
  _MarkForUpload: True
  dmi.bios.date: 05/15/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0TM99H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd05/15/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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